Temperature-indicator for automobile-radiators



Patented May 18, 1920.

- W/T/VESSES l/VVEN 70H I 540W W5 ATTORNEYS "WILTON F. JENKINS, 0FBICHMQND, VIl'tG-ZETIA.

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Specification of Letters Patent.

J i J 1 i atented re, M226 Application filed llIay 3, 1919. Serial No.294,536.

1 b all 10. mm, it may concern.

Be it known that I, lVILToN F. JENKINS, a citizen of the United States,and a. resident of Richmond, in the county of Henrico and the State ofirginia, have invented certain new. and useful Improvements inTemperaturelndicators for r-Xutomobile-Radiators, of which the followinga specification.

This invention is an improvedtemperature indicator for automobileradiators.

One of the principal objects of the invention is to provide an indicatorwhich will exhibit a. column ofstea m to the driver of the automobileimmediately the. radiator begins to boil.

Another object offlthe invention is to prorice a radiator" cap ivithmeans whereby a column of steam will be exhibited as soon. as theradiator begins to boil, so that the driver will be informed either inthe day time or at night of the fact that the Water is boiling.

A further object of the invention is to provide an improved temperatureindicator of the'class described which will be exceed ingly simple,durable, efficient 'in operation and inexpensive to manufacture andmaintain. V

With these and other objects in View, which willbecome apparent as-thedescription proceeds, the invention resides in tie construction,combination and arrangement of parts hereinafter more fully describedand claimed, and illustrated in the accompanyingdrawing in which likecharacters of reference indicate like parts throughout the severalfigures of which:

Figure 1 represents a perspective View of the radiator of anautomobile-equipped with an automobile temperature indicator constructed according to my invention.

Fig. 2 represents a vertical section view of the invention. n

Referring more particularly to the draxw ing, I'providc a radiator cap 5with a corn trul opening (3 through which an exteriorly threaded tube 7is passed. This tube is on larged at its lower end as at 8 to provide ashoulder 9 engaging against the under face of the cap The bore 10 of thetube is branched as at 11 at a point below the shoulder 9, and theenlarged end 8 of the tube, below the branches 11,,is provided with ncircular bnflic plate 12.

- cap tube 13 iuteriorly threaded at its the restricted invention andthe scope of the lower end as at 15%, is screwed onto the upper end ofthe tube 7, and carries the washer 15 forming a tight fit between thetube and the radia tor cap. The upper end of the cap tube is providedwith a restricted. port 16 of a diameter less than thediameter or"; thebore 10 of the tube 7.

Inoperation, as soon as the water begins to boil, the steam Will pass upthrough the annular space between the bailie plate and the interior ofthe radiator find its way through the branches 11 and the bore of thetube 7, into the cap tube 13 and out in the form of a column throughportlo. 'By reason of the fact that the port 16 is of a relatively smallarea as compared with the bore of the tube 7, the pressure Within thetube 13 will be built up suficiently to eject the steam in a column upthrough theport 16. This column of Will immediately notify the driver,in the daytime, or at night, of the fact that the Wateris boiling.exhibited at night by reason o the fact that the column will show upclearly against the rays from the'head lights. I T he baffle plate 12,While allowing a ready passage of steam through the'tubes, will preventWater from being splashed up through the branches 11. inte the tubes.

.The portion 18 of enlarged end 8 of the tube, below the bathe plate 12is preferably polygonal in conformation so as to form a nut- 'forreceiving a Wrench in assisting the assembly of the device. Similarlythe cap tube may be made polygonal in form at a suitable point as at 19.

Although I have described the preferred embodiment ofmy invention, 1 maydesire tomake such changes in theconstruction, combination andarrangement of parts there,- of as do not depart from the spirit of theappended claims. I claim 7 1. The combination with a radiator cap, of atube extending therethrough and havi 11;; an enlarged lower endproviding a shoul dcr engaging against the under surface of the cap, thebore of the tube being branched at a point below the shoulder, a bufdeplate arranged below the branches of the bore for preventing water beingsplashed into the tube and a cap tube arranged on the upper side ottheradiator cap and engaging the cap, and will I.

It "will be first said tube and provided with a restricted port of adiameter less than the diameter of the first said tube.

with lateral branches opening within the cap, an outwardly extendingbalfie plate carried. by the tube below said branches, and a cap tubearranged on the radiator cap and engaging said first named tube, saidcap tube being provided with a small port.

4. The combination with a radiator cap,

of a tube extending therethrough and having a bore terminating at itslower end in lateral branches opening w1th1n the cap, an

outwardly extending baffle plate formed integrally upon said tube belowsaid branches, and a cap tube on the upper end of said first named tubeprovided with a port.

WILTON F. JENKINS.

